Preheat oven to 375 degrees F.

In a large bowl, beat together the butter and sugars until light and fluffy with a stand up mixer or hand held mixer.

Then mix in the eggs and vanilla extract.

In a separate bowl, stir together the flour, baking soda and baking powder.

Then gradually add the flour mixture to the butter mixture.  Mix on a low speed and mix until just combined.  Be careful not to over mix.

Then gently stir in the chocolate chips and chopped walnuts.

Place tablespoons of the dough onto a baking sheet using a cookie scoop.

Then bake for 10-12 minutes until the cookies are slightly golden brown around the edges.

Let the cookies set on the baking sheet for 5 minutes and then move the cookies to a wire rack to cool completely.